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发明名称
BIT FOR BORING PROVIDED WITH SUCTION JET DEVICE
摘要
申请公布号
JPS53122602(A)
申请公布日期
1978.10.26
申请号
JP19780008199
申请日期
1978.01.27
申请人
INST FRANCAIS DU PETROLE
发明人
CASTEL YVON;CHOLET HENRI
分类号
E21B7/18;E21B10/18;E21B10/60
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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